Drug interactions
Fludrocortisone + Methadone
Severity: Minor
Fludrocortisone and Methadone: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Fludrocortisone is primarily a mineralocorticoid with minimal CYP3A4 induction, so any reduction in methadone levels is unlikely to be clinically important. Its potassium-lowering effect is more relevant, as hypokalemia can increase QT risk with methadone.
What this interaction means in plain words
Fludrocortisone and Methadone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Fludrocortisone belongs to Endocrine; Methadone belongs to Musculoskeletal.
Why it happens
Minimal or theoretical CYP3A4 induction; fludrocortisone-induced hypokalemia may add to QT risk.
What to do
No methadone dose change is usually needed. Monitor serum potassium and correct hypokalemia.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Methadone
- Alvimopan + Methadone Contraindicated
- Calcium / magnesium / potassium / sodium oxybates + Methadone Contraindicated
- Droperidol + Methadone Contraindicated
- Ibutilide + Methadone Contraindicated
- Isocarboxazid + Methadone Contraindicated
- Lefamulin + Methadone Contraindicated
Other interactions of Fludrocortisone
Frequently asked questions
Can I take Fludrocortisone with Methadone?
MediHelp rates the interaction as minor. Fludrocortisone and Methadone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Fludrocortisone is primarily a mineralocorticoid with minimal CYP3A4 induction, so any reduction in methadone levels is unlikely to be clinically important. Its potassium-lowering effect is more relevant, as hypokalemia can increase QT risk with methadone.
How serious is the interaction between Fludrocortisone and Methadone?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No methadone dose change is usually needed. Monitor serum potassium and correct hypokalemia.
What other medicines interact with Methadone?
MediHelp also lists interactions of Methadone with, for example, Alvimopan, Calcium / magnesium / potassium / sodium oxybates, Droperidol. The full list is on the Methadone page.
Full monographs, dosing and an interaction checker in the MediHelp app
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